Directional Cooling-Induced Fracturing Westerly Granite Test Results

Dataset · Thu Dec 17 23:00:00 EST 2020

DOI:https://doi.org/10.15121/1780913· OSTI ID:1780913

Nakagawa, Seiji ^[1]

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1. Lawrence Berkeley National Laboratory

Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on a short, cylindrical sample of Westerly granite (diameter = 4 inches, height ~ 2 inches). Liquid nitrogen was poured in a copper cup attached to the top of the sample, and the resulting acoustic emissions (AEs) and temperature changes on the surface of the sample were monitored. The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. Included in this submission is an animation of the AEs, a graphic displaying the temperature changes, and the measured data.

• Research Organization: DOE Geothermal Data Repository; Lawrence Berkeley National Laboratory
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (EE-2C)
• Contributing Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: EE0009033
• OSTI ID: 1780913
• Report Number(s): 1302
• Availability: [e-mail]
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
Westerly granite
acoustic emissions
directional cooling
directional cooling-induced fracturing
fracture
geophysics
geothermal
granite
induced fracturing
laboratory experiment
liquid nitrogen
microcracking
moment tensor
seismic
stimulation
stress
temperature
temperature changes
thermal
thermal cracking
tomography
velocity
wellbore